Make LayoutState always be RAII

Source/core/rendering/RenderTableRow.cpp

 /**
  * Copyright (C) 1997 Martin Jones (mjones@kde.org)
  *           (C) 1997 Torben Weis (weis@kde.org)
  *           (C) 1998 Waldo Bastian (bastian@kde.org)
  *           (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
@@ skipping 181 matching lines @@
                 if (RuntimeEnabledFeatures::repaintAfterLayoutEnabled()) {
                     // FIXME: Is this needed with repaint After Layout?
                     child->setShouldDoFullRepaintAfterLayout(true);
                 } else {
                     child->repaint();
                 }
             }
         }
     }
 
-    statePusher.pop();
     // RenderTableSection::layoutRows will set our logical height and width later, so it calls updateLayerTransform().
     clearNeedsLayout();
 }
 
 LayoutRect RenderTableRow::clippedOverflowRectForRepaint(const RenderLayerModelObject* repaintContainer) const
 {
     ASSERT(parent());
 
     if (repaintContainer == this)
         return RenderBox::clippedOverflowRectForRepaint(repaintContainer);
@@ skipping 72 matching lines @@
 
 RenderTableRow* RenderTableRow::createAnonymousWithParentRenderer(const RenderObject* parent)
 {
     RenderTableRow* newRow = RenderTableRow::createAnonymous(&parent->document());
     RefPtr<RenderStyle> newStyle = RenderStyle::createAnonymousStyleWithDisplay(parent->style(), TABLE_ROW);
     newRow->setStyle(newStyle.release());
     return newRow;
 }
 
 } // namespace WebCore